Edit report at https://bugs.php.net/bug.php?id=62465&edit=1
ID: 62465 Updated by: ras...@php.net Reported by: fabrizio at queensboro dot com Summary: intval of floats -Status: Open +Status: Not a bug Type: Bug Package: *General Issues Operating System: reeBSD 9.0-RELEASE - amd64 PHP Version: 5.4.4 Block user comment: N Private report: N New Comment: Floating point values have a limited precision. Hence a value might not have the same string representation after any processing. That also includes writing a floating point value in your script and directly printing it without any mathematical operations. If you would like to know more about "floats" and what IEEE 754 is, read this: http://www.floating-point-gui.de/ Thank you for your interest in PHP. You are going to want to round() and not truncate here. Previous Comments: ------------------------------------------------------------------------ [2012-07-02 16:30:12] fabrizio at queensboro dot com Description: ------------ Converting from a float to an integer doesn't always return the correct values. Try this code: <?php $grand_total = 8.9500; $amount = intval($grand_total*100); var_dump($amount, $grand_total*100, (int)($grand_total*100)); ?> This will output: int(894) float(895) int(894) when I would expect: int(895) float(895) int(895) Test script: --------------- <?php $grand_total = 8.9500; $amount = intval($grand_total*100); var_dump($amount, $grand_total*100, (int)($grand_total*100)); ?> Expected result: ---------------- int(895) float(895) int(895) Actual result: -------------- int(894) float(895) int(894) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62465&edit=1
